bariquand



May 28, 1929.

G. BARIQUAND CARBURETOR Filed May 23, 1927 ,2' Sheets-Sheet, l

May 28,1929. y BRIQUAND i 1,715,269

V CARBURETOR L Filed May 23, 1927 2 Sheets-Sheet 2 l i Patented May 28, 1929.

UNITED STATES PATENT OFFICE.

GEORGES IBARIQlIIANl"z OF PAR-31S, FRANCE, ASSIGNOR TO S. SMITH AND SONS MOTOR ACCESSORIES LTD., OF LONDON, ENGLAND.

CARBURETOR.

Application filed May 23, 1927, Serial No. 193,655, and in France .Tune 11, 1926.

rlhis invention relates to carburetors 'for internal-combustion engines of that type comprising' an automatic suctioi'i-actuated valve sliding vertically within a vertically disposed cylindrical suction-chamber and arranged to cover and and uncover' successively a plurali- 'iy of separate straight ducts extending through the cylindrical wall of said chamber, each or each but one of said ducts-having a fuel jet delivering into it Afrom a constant-level fuel chamber.

lt is the object of the presentinvention to provide a horizontal carburetor et this type which shall be simple in construction and eflicient in operation.

According to the present `invention a carburetor oit' the type described above is provided with a horizontal delivery passage comn1 rmicating withtlie suction-chamber through its cylindrical wall and the ducts open into that part of the cylindrical wall oi' the inining chamber facing said delivery passage and have their axes parallel toi or inclined at a small angle to the axis olf the delivery passage, whereby a straight or substantially straight tlowol" the mixture through the suction chamber is ensured. Preferably the ducts are all situated at the saine level and the suction valve is termed with an outlet port'constantly registering vf'ithv the delivery passage,V and with a plurality inlet ports oi varying heights, cach conm'uinicating with the aforesaid port and registering with Vone of said ductsin suoli mann u' that asfthe valve rises the ducts are uncovered in succession.

ponvenientlyj the carburetor comprises.

.retained within the suction chamber by the aforesaid cap; with this construction the reinoval of the cap allows the annular member with the "jets and fuel chamber carried by it and the suction valve, to be removed from the carburetor for cleaning or any other purpose.

An embodiment of the present invention will now be described merely by Way of eX- ample with the aid ot the accompanying drawings, in which:

Figure 1 is a vertical section on the line l-l of Figure 2 of a carburetor according to the invention.

Figure 2 is a horizontal section on the line 242 ot Figure l, and

FiguresB and 4 show the carburetor in outside elevation and plan respectively.

Lilie reference numerals indicate like parts in all the igures oit the drawings..

The body l oi' the carburetor has a vertically-disposed cylindrical suction-chamber 52 containing the suction-valve 2 which is adapted to slide v-Jithout rotating. To this end, the suction-valve 2 has a longitudinal groove 3 (see Figure 2) with which engages a key or screw 4 secured to the body l. The bottom oit the suction-chamber 52 is closed by a cap 5 screwed into it, and the top is closed by a screw-cap 51. This cap 51 is provided with a downwardly extending vertical pin 53 and a bored part 54 of the suction-Valve2 is received on it and is guided by it.

The lower cap 5 is .provided with an opening into which is screwed a plug' 7 provided with a hole. The plug 7 can be changed tor one with a larger or a smaller hole lor the purpose oit regulatingat will the depression which is produced in thebottonr ofthe suction-chamber 52 by the movement the suction-valve 2. i i

- A horizont-al delivery-passage 49 opens into the cylindrical wall oli the suction-chamber 52 at about the middle of its length. "Within the passage 49 there is provided fa throttle valve 2O mounted upon a spindle 2l and actuated by a lever 22 in well-known manner. The lever 22 is provided ywith the usual arm 26 which engages with the usual adjustable abutment 24 to limit the movement `of the `throttlc-valve from its closed to its open position. A lange 19 is provided whereby the carburetor may be bolted on to the engine.

In that partof the cylindrical wall ot the suctionchamber opposite to the delivery-passage 49there are provided three horizontal radiating ducts 8, 9 and 10 arranged` in the shape of a fan and having their axes in the same horizontal plane. ductsare parallel or inclined at a small angle to the axis oit the deliverypassage 49 sov that the mixture formed in the ducts will not have to travel round any considerable bends in its The axes ot theseV i passage through the carburetor. If the mixture has to. travel round any Considerable bendsin the carburetor there is a considerable tendency for the petrol to separate out therefrom with consequential loss of efliciency. lt will thus be seen that the absence of any considerable bends 'in the present construction will be conducive to efficiency.

Surrounding the lower end of the suctionchamber 52, there is an annular member 17 which has formed integral with it the lioatchamber 5'5 and is formed with a fuel conduit 18. Fuel jets 13, 14 and 15 are carried by this annular member and project into the ducts 8, 9 and 10 respectively. rlhe annular member 17 also carries a slow-running jet which feeds the slow-running mixture `through passages 35,38 to a port 37 adjacent to and on the engine side of the'throttle valve 20.

The suction-valve 2 is annular in shape and is closed at its bottom so that it will be lifted by the dierence in' pressure in the suctionchamber above and below its closed bottom. rThis valve-is formed with a port 5() which is always inregister with the delivery `passage i9 and with three ports 27, 28 and 29 which are adapted to register with the ducts 8, 9 and 10 respectively. The ports 27, 28 and 29 have their lower edges on the level of the upper surface of the bottom of thexsuction-valve and are of varying length in the direction of the axial length ofthe suction-valve. The port 27 is of such length that when the suctionvalve is at the bottom of the suction-chamber, as shown in Figure 1, the port partly'registers with the duct 8 and places it in communication with the suction chamber. The port 28 is of such length that when the valve is at the bottom of the suction-chamber, it will just not register with the duct 9 which does iiotftherefore, communicate with the. suction-chamber. The port 29 is of less length than the port 28. f

As the throttle valve 2O is opened, a strong suction v-i-;-:1produced in` the 'suction-chamber 52 andthe suction-valve 2 will be elevated by the air-pressure under it due to the leakage from the hole in the plug 7. As the valve lifts, it. will firstA fully uncover the vduct 8, then uncover the duct 9 owing to the port 28 registering with the latter and will finally uncover the duct 10 owing to the port 29 registering with the duct. rlhe amount of lift of the valve will be dependent upon the amount of opening of t-he throttle as is wellknown in-this type of carburetor.

Extra air passages l2 are provided one communicating with each of the ducts 8, 9 and 10,'and opening into a iatvertical face of the'carburetor.. A flat rotary valve 39 is secured by means of a stud 40 on to this flat face and is vformed with ports 41 adapted to' register with the extra air passages 42. This Valve may be operated in any desired manner, suoli as by a rod secured at 43 to it, and serves to allow extra air to pass'through the passages Ll2 and ducts into the suction-chamber when so desired.

lt will be noted that the carburetor is simple to construct and that the removal of the cap 5 allows the carbm'etor to be completely dismantled since both the suction-valve 2 and the annular member 17 with the parts secured to the latter are retained in the carburetor by the cap 5 only.

'lhis invention is not limited to the precise constructional detail described above and is capable of many modifications.

Vhat I claim:

1. A carburetor comprising a vertically disposed cylindrical suction chamber, a horizontal delivery passage communicating with the suction chamber through its cylindrical wall, a plurality of separate straight ducts opening into that part of the cylindrical wall of the suction chamber facing said delivery passage and being substantially aligned wit h the delivery passage, an automatic suctionactuated valve slidable in said sruztion-chamber and arranged to cover and uncover' the ducts successively, an annular member constituting a fuel supply pipe and surrounding said suction chamber. a plurality of fuel jets carried by said annular member and extending into said ducts d a cap which closes the lower end of the suction chamber and detachably secures said annular member to the suction chamber.

2. A carburetor comprising a vertically disposed cylindrical suction chamber closed at its upper end, a horizontal delivery passage con'nnunicatinp; with the suction chamber through its cylindrical wall, a plurality of separate straight ducts situated at the same level and openinginto that part of the cylindrical wall of the suction chamber facing said delivery passage and being substantially aligned with the delivery passage, an annular member surrounding` said suction-chamber, a fuel supply passage in said annular member, a plurality of jets carried by said annular member, an automatic suction actuated valve slidable in said suction-chamber Vand formed with an outlet port constantly GEORGES BARIQJUAND. 

